Cryogenian Aspidella from northwestern Canada

Greg Burzynski,T. Alexander Dececchi,Guy M. Narbonne,Robert W. Dalrymple

Precambrian Research（2020）

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摘要

•New Cryogenian-age “Twitya disc” fossils from NW Canada are described.•Previously described Twitya discs from NW Canada are revisited.•Two specimens represent the Ediacaran form-taxon Aspidella.•This extends the time range of Aspidella by 80 Ma.•This supports a deep-water origin of Ediacara biota.

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关键词

Cryogenian,Ediacara biota,Twitya discs,Aspidella

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